RS-12 vs RS-5: Signature Exhaust for KTM/Husqvarna
By Yoshimura R&D of America, Inc. | Published: 2026-10-23
Category: Comparisons
Compare the Yoshimura RS-12 and RS-5 Signature Series slip-ons for KTM/Husqvarna 250/350/450 models. Learn which exhaust fits your riding style and budget.
Quick answer
For KTM/Husqvarna 250/350/450 riders who want a USFS-approved spark arrestor and extra low-end torque, the RS-12 slip-on is the better choice. If you prioritize top-end power and a lighter weight, the RS-5 is worth the upgrade.
What makes the RS-12 different
The RS-12 is Yoshimura's newest slip-on for KTM SX-F and Husqvarna FC dirt bikes. It's built with a stainless steel header and an aluminum muffler, and it includes a USFS-approved spark arrestor in every unit. That means you can ride on public lands without worrying about fines or trail restrictions.
Where the RS-5 fits in
The RS-5 is a well-established Signature Series option known for its lightweight titanium construction and strong top-end power. It does not come with a built-in spark arrestor, so you'll need to add one separately if you ride in spark-arrestor-required areas. The trade-off is a noticeable weight savings and a more aggressive power curve at higher RPMs.
RS-12 vs RS-5: Key trade-offs
- Spark arrestor: RS-12 comes with a USFS-approved spark arrestor included. RS-5 requires a separate purchase.
- Power delivery: RS-12 increases torque for better low-end grunt. RS-5 focuses on top-end horsepower gains.
- Weight: RS-5 uses titanium and is lighter than the RS-12's stainless/aluminum construction. If weight is your top priority, the RS-5 saves more grams.
- Price: RS-12 is priced at USD 524.30 (catalog comparison USD 749.00), making it a more affordable entry into the Signature Series.
Product facts
- KTM/Husqvarna 250/350/450 23-27 RS-12 Stainless Slip-On Exhaust, w/ Aluminum Muffler: The RS-12 slip-on includes a USFS-approved spark arrestor in every unit. You can ride on public lands immediately without buying a separate spark arrestor.
KTM/Husqvarna 250/350/450 23-27 RS-12 Stainless Slip-On Exhaust, w/ Aluminum Muffler
Which one fits your build?
Best for
- Riders who need a spark arrestor and want improved low-end torque on KTM/Husqvarna 250/350/450 models
- Budget-conscious riders looking for a performance slip-on with included trail-ready features
Not ideal for
- Riders who prioritize absolute minimum weight and maximum top-end power over low-end torque
